package com.xxl.job.core.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * file tool
 *
 * @author xuxueli
 * @since 2017-12-29 17:56:48
 */
public class FileUtil {

	private static final Logger logger = LoggerFactory.getLogger(FileUtil.class);

	/**
	 * delete recursively
	 * @param root
	 * @return
	 */
	public static boolean deleteRecursively(File root) {
		if (root != null && root.exists()) {
			if (root.isDirectory()) {
				File[] children = root.listFiles();
				if (children != null) {
					for (File child : children) {
						deleteRecursively(child);
					}
				}
			}
			return root.delete();
		}
		return false;
	}

	public static void deleteFile(String fileName) {
		// file
		File file = new File(fileName);
		if (file.exists()) {
			file.delete();
		}
	}

	public static void writeFileContent(File file, byte[] data) {

		// file
		if (!file.exists()) {
			file.getParentFile().mkdirs();
		}

		// append file content
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(file);
			fos.write(data);
			fos.flush();
		}
		catch (Exception e) {
			logger.error(e.getMessage(), e);
		}
		finally {
			if (fos != null) {
				try {
					fos.close();
				}
				catch (IOException e) {
					logger.error(e.getMessage(), e);
				}
			}
		}

	}

	public static byte[] readFileContent(File file) {
		Long filelength = file.length();
		byte[] filecontent = new byte[filelength.intValue()];

		FileInputStream in = null;
		try {
			in = new FileInputStream(file);
			in.read(filecontent);
			in.close();

			return filecontent;
		}
		catch (Exception e) {
			logger.error(e.getMessage(), e);
			return null;
		}
		finally {
			if (in != null) {
				try {
					in.close();
				}
				catch (IOException e) {
					logger.error(e.getMessage(), e);
				}
			}
		}
	}

}
